Winding for electrical machines.



B. G, LAMME WINDING FOR ELECTRICAL MACHINES.

APPLIUATION FILED JUNE 2, 1905.

Patented June 1, 1909.

nnrrsn STATES Parana err-ace.

BENJAMIJN'G. Lianne, orrmafssnn PEllliiYLvANlA, ASSIG-NOR TO WESTINGHOUSE ELEF TRIO & MANUFAGTUBIM; CGMPAN Y, A UORPOEAFION OF PENNSYLVANIA;

To alli tphomjitfniay concern: ride itlinownthat I, BENJAMIN G. LAMME, a pltlgil of'the'United'States, and aresident Q'f 'Pittsburg, in} the county of "Allegheny -}and State of Pennsylvania, have invented a new and useful Improvement in Windings forElectrical- Machines,of which the folilowingiisla specification. 5

1 My invention relates to dynaino-electric ":Ifn'a'chin'es'andparticularly to windings there- 101. ll

. My invention has forits object to provide an improved form of winding. fouuse with maghetizable cores having partially closed la-s In thecmistruc'tion of dynamo-electric mait is frequently important that the armature cores' be provided-with teeth the j 'bntenfree ends of which. project laterally 210 to: form partially closed slots bet-ween the "tee 11, this constructionhyeing particularly- .des rableiwhereit is necessary that the ampere turns for magnetizing the core be as p 0? as possiblen l Vith .this form core 2 5 str.u cture, the winding conductors ha ve genera'll been threaded longitudinally through the s ots or nserted individual] y through the narrow .openhigsin the tops of the slots.

' Whenfthe latter method has been practiced ,3 the conductors have en carefully and separately insulate d before being inserted, be- 4 cause ofthe great difficulty of applying in- -sulation.aftertheconductors have once been located in the slots. .If this insulation is of 135iv the usual/characterand is applied in the ordinarymannen-fthe quantity employed to provide proper. mechanical strength may. be

,1 greater'thanis necessary for insulatingpun I 40 ,II n' some instancesthe core slots may be of ample dimensions to'accommodate' the condoctors and the extra insulating material, j b 'ut. where-"it, is desired to place a certain -,."number of conductorsin the slots of a core 4650f a} iven diameter. itis sometimes found that .t e crosssectio nal area ofithe teeth is I 'so.-jsn1all astorequiresuch an increase in the number-of magnetizing ampere "turns ts ineutralize thebenefit derived from the partially; closed slots.,- In such case desirable to reduce the size otYthe andmy.inventionprovides a winding ture that is easily applied and that requ res less space than those comprising separately applied and insulated conductors.

Specification of Letters Patent.

'tion.

is paced slots.

WIN FOB ELEGTBIGAK MAUHZNES.

Patented June 1, was.

Application filed June 2, 1905. Serial No. 263.480.

My invention consists individing the coin doctors that are located side by side in the slotsinto a plurality of separately insulated groups each of which constitutes a separately applied unit, the insulation between adja- 0 cent conductors being thin as compared with that between adjacent grou s. For exam ple, if six. conductors are 'l ocated side by" side in each slot, they may be divided into three groups with comparatively thin insula- '65 "tion between the two coiliductors of each group but with heavier ins ilation. surrounding the groups, Thus, the heavier insulation is ap'pliedto three ,irs o'fconductors instead. of being japplie to the conductors individually lahd"a coniderable saving in the space'i'equired for insulation is effected. )ther. arrangements will be more specifically described hereinafter. V

-ll n theaccompanying drawing Figure l 7 is a longitudinal, crosssectional VlBW of a portion of anarmature having a winding constructed in accordance with my inven Fig. 2 is a transverse, cross-sectional view througha portion of an armature and a winding constructed in accordance with my invention and Figsfi and 4 are views similar to. 1* ig. 2 of modifications of the arrangements of winding and core slots.

A magnetizable core lnis provided with circumferentially located teeth 2 having such laterally projecting free ends 3 that the. slots'twhich are thus formed are provided with openings at the circumference of the core that are narrow as conipared with the body portions of the slotsfAs here shown, each slot-4t comprises a wide, outer portion 4 and a relatively narrow, inner portion 4; the sides of both portions of the teeth 2 are or may be of substantially the same width as the outer port-ions [Uljih cent to the lateral projections 3. This structure is such as to insure aproper distribu-. tion of the niagnetizable material for satisfaclory operating conditions; The winding comprises formed coils (3 which arefjso ap lied lto the magnetizable core. that the sn es? constitute the outer layer and thef'bp'ph'site' sides 8" the inner layer in the-ITouter portionsj l of properly Resistance conductors 9 may connect one end 'ofeach'of the coils 6' to a corresponding commutator segment- 10, and these conductors may be located in the nar- 75.10

rality groups of an'unequalnumber of to or difierent from the number of groups of armature conductors per layer.

of conductors, and the details of construc-' two side groups being inserted first andinvention.

groups for the purpose of separating them iv from each other and from the magnetizable core, the heavier insulation being employed a to afford both mechanical su iport and electrical insulation. The width of the open- I ings. 5 at the outer sides of the slots should be such at to admit of insertion of the groups singly, and their width may be determined, by the widest groups to be located in the 5 slots. The resistance conductors 9 may also be divided into groups in' a manner specified tor the armature coil conductors and each group may be separately insulated and applied to the core.

The arrangements of the conductors .in groups may be considerably varied from what is shown in Fig. 2, a modification of such arrangement being shown in Fig. 3, in

constitutes the side'8 of the coil, is divided I into two groups, while the outer layer of conductors is divided into three groups, the width of the openings .5'being such as to 1 admit of insertion of the lower and thicker i groups. It will generally be found necesf sary, or at least 'expedient,to divide the conductors for the outer layer into three groups in order to facilitate insertion, the

l l l I which the mner layer of conductors, which l then the middle group. No difliculty need ordinarily be, experienced in inserting the groups which constitute the inner layer; because of the ample amount of space in the outer portions of the slots within which the groups may be adjusted during insertion. If an odd number of conductors be placed side by side in the slots, they may be divided into groups having unequal numbers of conductors per group, so as to provide an odd number of'groups, such an arrangement being shown in Fig. 45 The resistance conductors 9 may also be divided into a pin-- conductors per group, as indicated in Fig. lg-the number of groups being either equal Other arran ements of the armature conductors and a so of the resistance conductors may be employed, and obviously similar arrangements may be employed for other numbers tion and arrangement be further varied without departing from the scope of my I claim as my invention: 1. In a dynamo-electric machine the' combination with a magnetizable.core having' longitudinal, peripheral slots the openings of which arecentrally located and are nar rower than the body portions thereof, of a winding the conductors of which are arranged in the c'ore'slots in aplurality of layers of separatelyinsulated groups having an uneven number of groups per layer.

2. In a-dynamo-electric machine, the combination'with a magnetizable core having longitudinal, peripheral slots the openings of which are centrally located and areless than half the width of the body portions" thereof, of a winding the conductors of which are arranged in the core slots in a plurality'of layers of separately insulated groups having an uneven number of groups per layer, the width'of each group being equal to-or less than the width of the slot openings. v

' 3. In adynamo-electric machine, the combination with a magnetizable core having longitudinal, peripheral slots, of a winding 90 the conductors of which are arranged in the core slots in a plurality of layers of separately insul'a\t ed groups having'an uneven number of groups per layer the number of conductoils in each of which is different from that in one or m dre of the other grou s.

4-,. Ina dynammelectric machine, the combinatioiiwith a magnetizable core having longitudinal, peripheral slots the openings of which'are narrower than the body por- 100 tions thereof, of. a winding the conductors of which. are arranged in the core slots in a "group being different from that in one or more of the other groups. a o

5, In a dynamo-electric machine, the combination with a magnetizable core haying longitudinal, peripheral slots the openings m ofwhi'ch are narrower than the body per-- tions thereof, of a winding the conductors of which are arranged in the core slots in a -.plurality of layers of separately insulated groups having an unequal number of conductorsper group and an uneven number, of groups per layer, the width of the thickest group'being equal to or less than the w dth of the slot openings. 6. In a dynamo-electric machine, the combination with a magnetizable core having longitudinal, peripheral slots the openings of which are narrower than the body portions thereof and are centrally disposed with reference thereto, of a winding the conduc- 5 tors of which are arranged in the core slots in a plurality of layers of separately in.- sulated groups having an unequal number of conductors per group and an uneven number of groups per layer, the width of each group no having an uneven number of roups per layer, the width of each group lieing'equal to or less than the width of the slot openings, a commutator, and resistance conductors for connecting the winding with the commutator, the resistance conductors being also arranged in the slots in a plurality of separately insulated groups.

8. In a dynamo-electric machine, the combination with a magnetizable core provided witlrlongitudinal, peripheral slots having relatively narrow, centrally located openings, wide outer portions and narrow inner.

portions, of a winding the conductors of which are arranged .in the outer, wide portions of the slots in a plurality of separately insulated groups, a connnutator, and resistance conductors located in the inner, narrow portions of the slots for connecting the winding to the commutator.

t). In a dynamo-electric machine, the combination with a magnetizable core provided with longitudinal, peripheral slots having relatively narrow, centrally located 0penlugs, wide outer portions and narrow inner portions, of a winding the conductors of which are arranged in the outer, wide portions of the slots in a plurallty or separately insulated groups disposed in ers havmg a plurality of groups per layer, the width of each group being equal to or less than the width of the slot openings, a commutator, and resistance conductors located in the narrow, inner portions of the slots for connecting the winding with the commutator.

10. In a' tly iaiiio-electi'ic machine, the combination' with a magnetizable core provided with longitudinal, peripheral slots having relatively narrow, centrally located openings, wide outer portions and narrow inner portions, of a winding the conductors of which are arranged in the wide outer por-' tions of the slots in a plurality of separately insulated groups, a commutator, and resistance conductors for connecting the winding to the commutator, said {conductors being located in the narrow inner portions of the slots and arranged in a plurality of separately insulated groups. I

11. In a dynamo-electric machine, the combination with a niagnetizable corehaving longitudinal, peripheral slots the openings of which are narrower than the body portions thereof and that are centrally disposed with reference thereto, of a winding-the conductors of which are arranged in the core slots in a plurality of layers of separately insulated groups having an uneven numberof groups per layer, none of sald groups being wider than the opening of the slot in which it is located. I

In testimony whereof, I have hereunto subscribed my name this 31st day of May, 1905;

' BENJ. Gr. LAMME, W'itn'esses:

ELIZABETH LIVINGSTONE,

BIRNEY I-Iuvns. 

